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Thanks, I assumed as much. It strikes me that in a very dynamic draw, supply situation, the Generation, load, and "surge" (battery) would have to be balanced in intricate fashion. At times , in load transition, the Battery is passive, merely a conductor, and the relative flow can create temporary overloads, and conversely, wide open draw. My question was meant to attempt to extrapolate a system I became used to, to the current one.
It strikes me that those two batteries are the pinch in a very large pipeline, so I would have expected there to be more than two batteries (each eight cells)...likewise ambient temps would seem to be rather important.
thanks for your response